British Standard - Consistent Plate Size across functions. World?s First and only Full-Flat Mechanical Switch. Patented Iso-Motion Technology - Ensures switch stays in the same position whether On or Off. Robust & Strong - Made of corrosion-resistant, heat-resistant and impactresistant polycarbonate. Designed to Last - Switches tested to 80,000 times; Sockets tested to 15,000 cycles. Green & Eco Friendly - RoHS compliant range.